Patents by Inventor Eiji Takahashi

Eiji Takahashi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10288475
    Abstract: An abnormality detecting apparatus (10) for a rotating machine includes: a calculating part (15) which calculates a phase difference between signals respectively output from two sensors of one or more sets, the one or more sets being predetermined combinations of two sensors among the plurality of sensors, the plurality of sensors each of which detects an elastic wave generating in the rotating machine (1) having a rotor during rotation of the rotor, the sensors being arranged at predetermined different locations of the rotating machine (1); a storing part (16) which stores in advance information concerning a relationship between a phase difference and a contact position when a contact occurs during the rotation of the rotor, regarding the one or more sets; and a specifying part (17) which specifies a contact position by using a phase difference calculated by the calculating part (15) and the information stored in the storing part (16).
    Type: Grant
    Filed: August 18, 2015
    Date of Patent: May 14, 2019
    Assignee: Kobe Steel, Ltd.
    Inventors: Kaname Araki, Eiji Takahashi
  • Publication number: 20190132842
    Abstract: [Problem] To estimate an open band in a wireless link precisely without imposing a communication load. [Solution] An open band in a wireless link is calculated from the bandwidth for a wireless link between a first wireless station and a second wireless station, a radio resource utilization rate, which is the ratio of the number of frequency blocks used for signal transmission with respect to the multiple frequency blocks constituting the bandwidth, and the radio quality of the wireless link.
    Type: Application
    Filed: April 5, 2017
    Publication date: May 2, 2019
    Applicant: NEC Corporation
    Inventors: Eiji TAKAHASHI, Kosei KOBAYASHI
  • Publication number: 20190123593
    Abstract: A wireless power feeding unit includes a power transmitting module and a power receiving module. The power transmitting module includes: a first inverter circuit which is connected to a power source via a switch; a first transmission coil connected to the first inverter circuit; a second inverter circuit which is connected to the power source or another power source not via the switch; a second transmission coil which is connected to the second inverter circuit; and a power transmission control circuit which controls the first and second inverter circuits. The power receiving module includes a first reception coil opposed to the first transmission coil and a second reception coil opposed to the second transmission coil. During operation of the first and second inverter circuits, even while supply of power to the first inverter circuit is stopped, the power transmission control circuit maintains control of the second inverter circuit.
    Type: Application
    Filed: December 20, 2018
    Publication date: April 25, 2019
    Inventors: Eiji TAKAHASHI, Hideaki MIYAMOTO
  • Patent number: 10267239
    Abstract: It is an object to suppress turbo lag, while suppressing a decrease in torque in an acceleration-transient state to a supercharged state, occurring owing to a rise in required load. In a prescribed steady state, an engine compression ratio ?m and ignition timing Tm are set so as to achieve a maximum thermal efficiency. In contrast, in a transient state from a non-supercharged state to a supercharged state, occurring owing to a rise in required load, the engine compression ratio is corrected to a higher compression ratio ?h and concurrently the ignition timing is corrected to a retarded timing value Th, in comparison with the engine compression ratio ?m and the ignition timing Tm during steady-state operation for the same load, thereby increasing exhaust energy due to a reduction in cooling loss and consequently suppressing a delay of response to a rise in supercharging pressure.
    Type: Grant
    Filed: September 4, 2012
    Date of Patent: April 23, 2019
    Assignee: NISSAN MOTOR CO., LTD.
    Inventors: Eiji Takahashi, Shinobu Kamada
  • Patent number: 10253700
    Abstract: A variable compression ratio internal combustion engine is provided with a variable compression ratio mechanism in which a mechanical compression ratio of the internal combustion engine changes in accordance with a rotational position of a control shaft, a low compression ratio side stopper, a high compression ratio side stopper, a sensor for detecting a rotational position of a drive shaft of an actuator, and an arm press-fitted onto the drive shaft. Relative rotation between the arm and the drive shaft occurs when a torque exceeding an upper-limit torque has been applied. The drive shaft or the control shaft is caused to move to restriction positions restricted by the respective stoppers, and then a diagnosis on the presence or absence of the relative rotation is executed, based on the detected values at the respective restriction positions.
    Type: Grant
    Filed: July 15, 2015
    Date of Patent: April 9, 2019
    Assignee: NISSAN MOTOR CO., LTD.
    Inventor: Eiji Takahashi
  • Patent number: 10247599
    Abstract: A rotating machine abnormality detection device and a rotating machine abnormality detection method according to the present invention are designed to detect an abnormality in a rotating machine including a rotary member rotatable about a predetermined axis, and detect an initial abnormality in the rotating machine based on first measurement data obtained by measuring a vibration in an ultrasonic wave band caused by the rotary member. A rotating machine according to the present invention includes the rotating machine abnormality detection device.
    Type: Grant
    Filed: August 18, 2015
    Date of Patent: April 2, 2019
    Assignee: Kobe Steel, Ltd.
    Inventors: Eiji Takahashi, Kaname Araki, Shugo Takaki, Yasuharu Matsumoto
  • Patent number: 10240005
    Abstract: Disclosed herein is an ABA type block copolymer including a repeating unit derived from lactic acid that is excellent in physical properties, such as toughness. The ABA type block copolymer includes a polymer block A including a repeating unit derived from lactic acid and a polymer block B including a repeating unit represented by a formula [I] linked in an order of A-B-A. In the following formula [I], R1 represents a hydrogen atom, an unsubstituted or substituted alkyl group, or an unsubstituted or substituted aryl group, R2 and R3 each independently represent a hydrogen atom, an unsubstituted or substituted alkyl group, or an unsubstituted or substituted aryl group, and n represents an integer of 1 to 10. X represents —S—, —SO— or —SO2—, and R4 represents an unsubstituted or substituted alkyl group, or an unsubstituted or substituted aryl group.
    Type: Grant
    Filed: July 13, 2016
    Date of Patent: March 26, 2019
    Assignee: NIPPON SODA CO., LTD.
    Inventor: Eiji Takahashi
  • Publication number: 20190089202
    Abstract: A power receiving device includes a power receiving antenna that receives AC power from a power transmitting antenna, a rectifier circuit that converts the AC power into DC power, a detection circuit that detects the DC power, a load driven by the DC power, a battery that charges the DC power, a switching circuit that provides i) connection and disconnection between the rectifier circuit and the load and ii) connection and disconnection between the load and the battery, and a control circuit that controls the power receiving device. The control circuit controls the switching circuit to disconnect the rectifier circuit from the load and connect the load to the battery if the DC power is less than or equal to a power threshold value, and drive the load by the DC power charged in the battery.
    Type: Application
    Filed: November 22, 2018
    Publication date: March 21, 2019
    Inventors: Eiji TAKAHASHI, Tsutomu SAKATA, Satoru KIKUCHI, Hiroshi KANNO
  • Publication number: 20190078511
    Abstract: A control method for an internal combustion engine which includes a variable compression ratio mechanism: controlling the compression ratio by using a control target compression ratio whose a variation amount per unit time is limited to be equal to or smaller than a predetermined variation amount threshold value; and setting a first variation amount threshold value which is the variation amount threshold value of the control target compression ratio per unit time toward a high compression ratio side, to be smaller than a second variation amount threshold value which is the variation amount threshold value of the control target compression ratio per unit time toward a low compression ratio side.
    Type: Application
    Filed: November 16, 2016
    Publication date: March 14, 2019
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Eiji TAKAHASHI, Kazuhiko OKAMOTO
  • Patent number: 10209144
    Abstract: A protection tube thermocouple (5) includes a thermocouple (52), and a protection tube (51) which accommodates the thermocouple (52). The protection tube (51) includes a conical portion (511) formed on a front end (54) side of the protection tube (51); and a hollow portion (53) which extends in the length direction of the protection tube (51) for connecting between a front end (54) and a rear end (55) of the protection tube (51) in the inside of the protection tube (51), and into which the thermocouple (52) is received. The hollow portion (53) in the conical portion (511) has a tapered portion (532) configured such that the sectional area of the hollow portion (53) decreases toward the front end (54).
    Type: Grant
    Filed: November 21, 2014
    Date of Patent: February 19, 2019
    Assignee: Kobe Steel, Ltd.
    Inventors: Toshihide Fukui, Eiji Takahashi, Chitaka Manabe
  • Patent number: 10199880
    Abstract: A wireless power feeding unit includes a power transmitting module and a power receiving module. The power transmitting module includes: a first inverter circuit which is connected to a power source via a switch; a first transmission coil connected to the first inverter circuit; a second inverter circuit which is connected to the power source or another power source not via the switch; a second transmission coil which is connected to the second inverter circuit; and a power transmission control circuit which controls the first and second inverter circuits. The power receiving module includes a first reception coil opposed to the first transmission coil and a second reception coil opposed to the second transmission coil. During operation of the first and second inverter circuits, even while supply of power to the first inverter circuit is stopped, the power transmission control circuit maintains control of the second inverter circuit.
    Type: Grant
    Filed: November 29, 2017
    Date of Patent: February 5, 2019
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Eiji Takahashi, Hideaki Miyamoto
  • Publication number: 20190028921
    Abstract: A communication load estimation system is provided with a load estimation means 501 for estimating a communication load of a wireless base station to be an object of estimation, using at least: a network parameter which is a parameter concerning the number of antennas used for signal transmission of the wireless base station; a first quality measurement value which is a measurement value concerning a quality of communication with the wireless base station and which includes at least total reception power; and a second quality measurement value which is a measurement value concerning a quality of communication with the wireless base station and which includes at least a signal to interference noise ratio of a reference signal.
    Type: Application
    Filed: December 19, 2016
    Publication date: January 24, 2019
    Applicant: NEC Corporation
    Inventors: Eiji TAKAHASHI, Daisuke OHTA, Takeo ONISHI, Takahiro SHIROSHIMA
  • Patent number: 10185067
    Abstract: A polarizing plate having an excellent optical property and a method of manufacturing the same. The polarizing plate includes: a transparent substrate transmitting light in a used bandwidth; an absorbing layer having at least a metal-containing semiconductor layer containing a metal, the absorbing layer being arranged as a one-dimensional lattice shaped wire-grid structure having a pitch smaller than the wavelength of the light in the used bandwidth; a dielectric layer arranged as a one-dimensional lattice shaped wire-grid structure having a pitch smaller than the wavelength of light in the used bandwidth; and a reflective layer arranged as a one-dimensional lattice shaped wire-grid structure having a pitch smaller than the wavelength of light in the used bandwidth, wherein the absorbing layer, the dielectric layer and the reflective layer are layered on the transparent substrate in this or reversed order.
    Type: Grant
    Filed: June 5, 2017
    Date of Patent: January 22, 2019
    Assignee: DEXERIALS CORPORATION
    Inventors: Akio Takada, Eiji Takahashi
  • Patent number: 10181761
    Abstract: A relay apparatus in a wireless power transmission system includes a relay power reception antenna that receives power transmission alternating current power from a power transmission power transmission antenna, a relay rectifier that converts the power transmission alternating current power into relay direct current power, a relay inverter circuit that converts the relay direct current power into relay alternating current power, and a relay power transmission antenna that wirelessly transmits the relay alternating current power. When the relay apparatus has received binary relay received data, the relay apparatus reverses a sign of the binary relay received data and eliminates a difference between a first voltage of the relay direct current power and a second voltage of the relay direct current power on the basis of the reversed binary relay received data.
    Type: Grant
    Filed: June 22, 2017
    Date of Patent: January 15, 2019
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Tsutomu Sakata, Hiroshi Kanno, Eiji Takahashi, Satoru Kikuchi
  • Publication number: 20190006525
    Abstract: A thin film transistor having a high operation speed with a field effect mobility greater than 20 cm2/Vs and a method for manufacturing the same, and a semiconductor device having the same are provided. A thin film transistor in which a gate electrode, a gate insulating film and an oxide semiconductor film are laminated on a substrate, a source region and a drain region are respectively formed in outer portions of the oxide semiconductor film in the width direction, and a channel region is formed in a region between the source region and the drain region; and a source electrode is connected to the source region, while a drain electrode is connected to the drain region. The gate insulating film contains fluorine; and the ratio of the width W of the channel region to the length L thereof, namely W/L is less than 8.
    Type: Application
    Filed: December 7, 2016
    Publication date: January 3, 2019
    Applicants: NATIONAL UNIVERSITY CORPORATION NARA INSTITUTE OF SCIENCE AND TECHNOLOGY, NISSIN ELECTRIC CO., LTD.
    Inventors: Yukiharu URAOKA, Haruka YAMAZAKI, Mami FUJII, Eiji TAKAHASHI
  • Patent number: 10170942
    Abstract: A power receiving device includes a power receiving antenna that receives AC power from a power transmitting antenna, a rectifier circuit that converts the AC power into DC power, a detection circuit that detects the DC power, a load driven by the DC power, a battery that charges the DC power, a switching circuit that provides i) connection and disconnection between the rectifier circuit and the load and ii) connection and disconnection between the load and the battery, and a control circuit that controls the power receiving device. The control circuit controls the switching circuit to disconnect the rectifier circuit from the load and connect the load to the battery if the DC power is less than or equal to a power threshold value, and drive the load by the DC power charged in the battery.
    Type: Grant
    Filed: September 8, 2016
    Date of Patent: January 1, 2019
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Eiji Takahashi, Tsutomu Sakata, Satoru Kikuchi, Hiroshi Kanno
  • Patent number: 10160153
    Abstract: Provided is a resin pelletizer device capable of monitoring cavitation. A resin pelletizer device (100) includes a die (6) including a die surface (61) in which die holes (63) are formed, rotary blades (21) that rotate on the die surface (61) in the water, thereby cutting resin extruded from the die holes (63) in the water into a pellet form, a sensor (150) that detects an elastic wave generated during the rotation of the rotary blades (21) on the die surface (61), and a determination unit (121) that monitors an output value of the sensor (150), and determines that cavitation occurs when the output value of the sensor (150) becomes less than a predetermined threshold.
    Type: Grant
    Filed: March 6, 2017
    Date of Patent: December 25, 2018
    Assignee: Kobe Steel, Ltd.
    Inventors: Ryo Tabuse, Eiji Takahashi, Chitaka Manabe, Kaname Araki, Shin Iwasaki, Tatsuru Miyamoto
  • Patent number: 10138998
    Abstract: A control device for a vehicle including a variable compression ratio mechanism arranged to vary an engine compression ratio of an internal combustion engine, and a torque converter which includes a lock-up mechanism, and which is disposed between the internal combustion engine and a transmission, has a controller configured to switch the engine compression ratio from a high compression ratio to a low compression ratio, and to switch the lock-up mechanism from a lock-up OFF state to a lock-up ON state. When the controller is switching the engine compression ratio from the high compression ratio to the low compression ratio, the controller starts switching the lock-up mechanism to the lock-up ON state when a current engine compression ratio is equal to or smaller than a permissible compression ratio which is between the high compression ratio and the low compression ratio.
    Type: Grant
    Filed: September 11, 2014
    Date of Patent: November 27, 2018
    Assignee: NISSAN MOTOR CO., LTD.
    Inventor: Eiji Takahashi
  • Patent number: 10123744
    Abstract: There is provided a biosensor capable of improving the S/N ratio of a final photoplethysmographic signal regardless of the change in a noise component such as extraneous light. A biosensor includes a driving signal generation unit for generating a pulsed driving signal, a light-emitting element for emitting light in response to a generated driving signal, a light-receiving section including a light-receiving element for outputting a detection signal in accordance with the intensity of light received and an amplification unit for amplifying a detection signal output from the light-receiving element, a filter unit for removing a pulse wave component from a detection signal output from the light-receiving section to obtain a baseline signal, and a differential amplification unit for taking a difference between a detection signal output from the light-receiving section and a baseline signal obtained by the filter unit.
    Type: Grant
    Filed: November 30, 2015
    Date of Patent: November 13, 2018
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventor: Eiji Takahashi
  • Publication number: 20180306671
    Abstract: A first determination unit performs a process (first process) of sequentially dividing an intensity value constituting first data by a reference intensity value to calculate an intensity ratio and determining whether the intensity ratio exceeds a first threshold (steps S3 and S4). When a predetermined period has elapsed, a second determination unit calculates an average change rate of the first data in the predetermined period to determine whether the average change rate is within a predetermined range (steps S9 and S10). When it is determined that the average change rate is within the range, the reference intensity value is updated and lowered (step S11). When the reference intensity value is updated, the first determination unit performs the first process by using the updated reference intensity value in the next predetermined period.
    Type: Application
    Filed: September 1, 2016
    Publication date: October 25, 2018
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (Kobe Steel, Ltd.)
    Inventors: Kaname ARAKI, Eiji TAKAHASHI, Shugo TAKAKI, Masato HAYASHI